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20102026
most citedMatter perturbations in Galileon cosmology

130 citations · 391 across the 17 of their papers we have counts for

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39 papers · 1 filter

gr-qc2026

Dyonic hairy black holes in gauge-invariant scalar-vector-tensor theories: Cubic and quartic SVT sectors

Masaki Kitagawa, Naoki Tsukamoto, Ryotaro Kase

We construct and classify asymptotically flat, static, and spherically symmetric hairy black hole solutions in gauge-invariant scalar-vector-tensor (SVT) theories carrying b…

gr-qc2025

Linear perturbations of dyonic black holes in the lowest-order gauge-invariant scalar-vector-tensor theories

Kitaro Taniguchi, Shunta Nishimura, Naoki Tsukamoto +1

We study linear perturbations on top of the static and spherically symmetric background of dyonic black hole solutions endowed with electric and magnetic charges, as well as a scal…

gr-qc2024

Scrutinizing black hole stability in cubic vector Galileon theories

Antonio De Felice, Ryotaro Kase, Shinji Tsujikawa

In a subclass of generalized Proca theories where a cubic vector Galileon term breaks the gauge invariance, it is known that there are static and spherically symmetric black…

gr-qc2024★ 3 cited

Neutral particle collisions near Gibbons-Maeda-Garfinkle-Horowitz-Strominger black holes after shadow observations

Naoki Tsukamoto, Ryotaro Kase

A Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS) black hole with a magnetic charge (or an electric charge) has noteworthy features that its scalar curvature near the event hor…

gr-qc2024★ 2 cited

Even-parity stability of hairy black holes in gauge-invariant scalar-vector-tensor theories

Chao Zhang, Ryotaro Kase

The gauge-invariant scalar-vector-tensor theories, which catches five degrees of freedom, are valuable for its implications to inflation problems, generation of primordial m…

gr-qc2024★ 13 cited

Constraints on the black-hole charges of M87* and Sagittarius A* by changing rates of photon spheres can be relaxed

Naoki Tsukamoto, Ryotaro Kase

The Event Horizon Telescope (EHT) Collaboration observed ring images called the shadows of M87* and Sagittarius~A* (Sgr~A*), which are supermassive objects in M87 and our galaxy, r…